As global warming threatens the future of our society, Jo Fidgen tackles the ways in which ordinary people can make a difference.

We're often told that we could help the environment by driving less, eating less meat, or using less water.

But in the face of a challenge as significant as global warming, how big a difference can small changes really make? And what would the world look like if we took those solutions to their logical extremes?

From asparagus to quinoa, your food can rack up a sizable carbon cost before it ends up on your dinner table. But choosing the most eco-friendly meals is not as easy as it seems.

Producer: Robert Nicholson

A Whistledown production for BBC Radio 4